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Mill D Bib Pant

At Backcountry, touring is written into our DNA. It's the first of many activities that define us as Gearheads, so when the product experts at Flylow Gear offered to incorporate our feedback and advice into the Backcountry x Flylow Mill D bib Pants, we jumped at the chance. These bib pants are the result of 20 years of backcountry-specific experience where we learned that the most important qualities for pants are ridiculous breathability and reliable waterproofing. Since Backcountry and Flylow share a passion for touring, it's no surprise that the Mill D provides that and more.

The Mill D's thin, light, 3-layer construction includes a waterproof, air permeable Polartec Neoshell laminate—one of the few waterproof membranes that’s actually air permeable. Unlike standard membranes, which only start breathing until after you work up a sweat, Polartec Neoshell starts to breathe the moment you pull it on. That reduces the risk of working up an inner layer of moisture while laboring up a skin track, only to have that turn into a clammy chill when you drop in on your line. The Mill D’s 3-layer construction is also ridiculously light, thin, and packable—ideal for international trips like the Japan trip that a crew of Gearheads go on every winter or any local dawn patrol where conditions are variable.

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"description of the bibs says"

Familiarity: I returned this product before using it

Height: 5'9"

Weight: 140lbs

The description of the bibs says that they have "Full-length ventilation zippers allow drop seat compatibility." This is, unfortunately, not the case. On inspection, they have half length side zips. This is a bummer, because to me this was one of the huge selling points, and a feature that is getting increasingly harder to find.

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Flexible and great all around!

Familiarity: I've used it once or twice and have initial impressions

Height: 5'7"

Weight: 145lbs

I'm usually wear a womens fit, but ended up borrowing these bibs for a few days of skiing. They were super awesome for skiing, keeping me warm and comfortable on morning skins as well as on a very cold resort day. To be honest, I like the colors available in the Men's version more than the women's version, but the part that goes around your torso was definitely wider. I just wore a belt in the belt looks to tighten it up for my morning skin when it was snowing and I just wore these and a lightweight layer underneath.

Nice color, good quality, lightweight, and easy to move in them. I wore a small, but am typically a Medium in women's.

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Nice moves

Height: 5'11"

Weight: 170lbs

I think this bib does a lot of things very well. The fit is nice if you’re not looking for a “freeride” fit. It’s lightweight, doesn’t restrict your movement (read rad après dance moves) and extremely breathable. I’ve never overheated in these bad boys. The fabric is so breathable that the bib pocket behind the nice climbing skin holder straps actually gets steamy. I’ve literally defrosted a frozen energy bar in there, so no complaints. I wear some R1 fleece pants underneath for inbound days and that seems to keep me at the right temperature for chilly chair lift rides. On backcountry days i go for a light capilene baselayer or some baggies and have felt downright comfy. My one piece of constructive feedback for these bibs is that they use these little 9 hooks to connect the straps to the bib vest. Sometimes they come undone if I bent over or was moving around skiing. I fixed the problem by replacing the 9 hooks with cheap keychain carabiners that my old climbing gym gave out. This seems to have completely fixed the issue. and I recommend them to anyone who wants a lightweight, super breathable, stretchy bib for inbounds and out of bounds use.

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How'd it get by R&D?

Familiarity: I've used it once or twice and have initial impressions

Fit: True to size

Love the bib fit & material. Hate the suspender buckles. How did that pass R&D? None of the reviews before I bought mentioned this. Now several do. I would not pay this price for having to monkey with finding my straps under my jacket several times a day.

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functional comfortable fantastic

Familiarity: I've used it once or twice and have initial impressions

Fit: True to size

Size Bought: small

Height: 5'8"

Weight: 165lbs

wore these for the first time in the backcountry today. 5 miles total travelled on AT gear and over 1k vertical (nothing crazy but a good couple of laps). it was -15 when I left my house and I was fine with just a midweight merino base layer. it got warmer by the time we started climbing but the high was still only 19. these bibs regulated temp well ( didn't use the leg vents, but I wasn't cold either!) they allowed movement well, I never felt restricted. good amount of pockets and great locations. the skin straps are fantastic! we did short laps so the bib was my outermost layer, just strapped skins on, skied down and put skins back on, never had to touch my backpack. for a longer ski down I would put my shell over top to trap heat and keep the skins and myself from icing up. I am 5'8" 165lbs, I wear 30x30 in all pants, and the small fit great with some room to spare. if anything the suspenders were a little long so I may reposition the velcro. my only complaint, as noted in other reviews are the suspender clips. I followed a previous reviewers suggestion and ordered. pair of the SEA TO SUMMIT- SIDE RELEASE FIELD REPAIR BUCKLE WITH REMOVABLE PIN- 1 inch wide SINGLE (1) PIN. great fix. great pant. worth the purchase and just order the repair buckle off the bat!

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Didn't even last a season

Familiarity: I've used it several times

Fit: Runs small

Size Bought: Large

Height: 6'1"

Weight: 190lbs

I bought these bibs after reading the rave reviews. Overall, they bibs perform exactly as I want. However the build quality is terrible. After only 20 or so days on them, they've already had their stitching come apart in the crotch. And yesterday, I bent over to strap my snowboard on doing groomers, and hear a rip in the back, not even on a seam. Looked and there's now a huge hole in my left back. Wish I could say it was because I had caught a rock or tree, but no, just a groomer. And I even went a size larger than normal after reading the reviews, so I really can't blame it on my huge rear end. Overall, disappointing. I'm just hoping that backcountry will back up their product. Really though, when spending several hundred dollars on new gear, I just expect it to last more than a month.

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Great Touring Jacket.

Familiarity: I've used it once or twice and have initial impressions

Height: 5'10"

Weight: 145lbs

I took some friends on their first backcountry tour this past week and decided to hook them up with some Backcountry gear. They said they felt comfortable the entire time. The venting on both the pants and jacket are great! The straps on the bibs come off easily but it does not take a genius to sort that out. Super great looking and functional gear in my opinion. Here is my friend taking his first lap.

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Backcountry Bibs

Familiarity: I've put it through the wringer

Fit: True to size

Size Bought: Med

Height: 5'8"

Weight: 175lbs

Hello from the Adirondack Mountains of NY. I too enjoy the lightweight protection of these bibs versus the more bulky type. I just had them out for hiking and skiing in sub-zero temps and with an extra layer underneath i was not cold at all . That was a concern i had with such a lightweight shell. I have had a few technical issues. I did have to fix the harness strap per described in other posts and that has worked although the one of the suspender straps ripped out of the back of the fabric the joins them in the back. The company has been very gracious in responding. I would recommend if they can fix the suspender issue.

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Time will tell

Familiarity: I've used it once or twice and have initial impressions

Fit: Runs small

Size Bought: medium

Height: 6'

Weight: 180lbs

I usually wear a large in ski pants. My last three pairs have been Patagonia, Arteryx and OR. When I tried on the larges they were a bit generous compared to the above mentioned manufacturers. I ordered a medium and they fit perfectly. I replaced the suspender buckles with sea to summit 1 inch field repair buckles off amazon for $13. We'll see how they hold up.

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First time Bib wearer

Familiarity: I've used it once or twice and have initial impressions

Fit: True to size

Height: 5'11"

Weight: 175lbs

I am still getting into the outdoor lifestyle, so I tried these with the assumption that 'bibs are for more hardcore people'- but I loved them. Ski'ed the Bird, had the suspender strap issue as previous mentioned, it kept popping off. But they were thin, dry, and kept me moving easily in them. Not restrictive at all. Hoping to see them in other colors.

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Amazing with modification

Familiarity: I've used it several times

Fit: True to size

Size Bought: Small

Height: 5'11"

Weight: 135lbs

The style, functionality, and quality of these bibs are on point! The only issue is the same issue that other reviewers have posted about. The loop that connects the suspender straps is much too large, the hook that clips into the loop is also too large, this is easily fixed with a bit of sewing. After a little modification by making that loop much smaller and tighter against the buckle, it easily fixes the issue of the buckle sliding out of the loop. I'm not sure how this ever made it past testing since I had this issue within the first 30 minutes of using them and then every single time I got onto the chairlift the buckle would unclip itself.

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Take it OFF!

Familiarity: I've used it several times

Fit: True to size

Height: 6'4"

Weight: 190lbs

Awesome pant for touring. No rubbing, lightweight, breathable, and sexy. They’re just a little too sexy though. The incompetent shoulder straps will detach at least four times on your skin up causing your pants to be around your ankles by the time you reach the summit.

Maybe backcountry sells some cool buckles or carabiners that could replace the hook?????

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Really dig these

Familiarity: I've put it through the wringer

Fit: True to size

Size Bought: Medium

Height: 5'7"

Weight: 155lbs

These bibs are sick. They really thought about all the features. The only knock I have on these is clips for the "bib" connection. I bought some new "clips" and they worked perfect. Very comfortable and light.

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Great bib but one big flaw

Familiarity: I've used it several times

Fit: True to size

Size Bought: Large

Height: 6'

Weight: 200lbs

I've used these bibs about 6 times now mostly for resort skiing. The large fits me well and the fabric is awesome, super light, breathable, and still waterproof. They are not too long and snug enough to feel secure but not restrictive. Pockets are easy to use and unzip with gloves on and the kangaroo pouch is so versatile!

My one issue is with the shoulder straps. The velcro adjustment is nice and easy to adjust but the attachment is not very secure. The hooks tend to slip out of the fabric loops easily, especially if I only have a base layer. I don't know if this is because the upper portion is too big but these would be an easy 5-star rating if a traditional buckle was used. If I'm wearing multiple layers they are fine because there is more tension on the strap but otherwise I've had to get creative to keep it secured. A bigger lip on the hook or a smaller fabric loop would be an improvement if changing to a buckle is not option for future versions.

I'm considering another pair of bibs to rotate but I think I'll look at the Baker bibs instead of a second color in these.

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Pretty Good Bid

Familiarity: I've used it several times

Fit: True to size

Size Bought: Medium

Height: 5'10"

Weight: 175lbs

I was super stoked to see Backcountry collab with Flylow to create these bibs. They are everything you need in a touring bib. The material is very durable, they kept me warm is freezing temps, and completely keep all moisture and wind out. The skin straps are an awesome perk as well. I really loved being able to fasten my skins away and keep them warm for my next lap.

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Dry and comfortable

Familiarity: I've used it several times

Fit: True to size

Size Bought: Small

Height: 5'10"

Weight: 160lbs

Three days of wet storm skiing at Mt Bachelor, Oregon. Four days in single digit powder at Bridger Bowl, Montana. These bibs kept me warm, dry, and comfortable while both alpine and tele skiing and hiking. Fit well with insulated jacket tucked in and thin knee pads underneath.

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Pretty Alright, Interesting Bib Fit

Familiarity: I've used it several times

Fit: True to size

Size Bought: Large

Height: 6'2"

Weight: 190lbs

These bibs are honestly pretty great! They fit pretty well through the legs, are incredibly breathable for the tour up, and super waterproof through it all! I took these both touring and to the resort and thought they were good for both. My other real complaint is the bib part; it just kinda fits off. Maybe its just my body type, but while the pant was snug and fit well, the bib portion was pretty loose and flowy. The skin carriers worked great on them and the pocket is great, but its just a little too flowy. Not a huge deal, but definitely something to consider! Overall, I would definitely recommend these for anyone looking for a good touring layer, or a lighter resort pant!

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Lightweight, Comfy Bib

Familiarity: I returned this product before using it

Fit: True to size

Size Bought: M (would need Large)

Height: 6'0"

Weight: 175lbs

I didn't actually get the chance to wear these on hill because I took out some Mediums, but they ended up not working too well. I would definitely need a Large. I tried on the mediums, and had the fit me better I would have loved them! they weren't too tight, just a bit too short. If I had Larges they would have been a perfect fit. I'd definitely recommend them. That skins attachment would have come in really handy!

Answer Eric's Question

These have a slimmer fit than typical FlyLow, especially the Bakers. If you generally sized down in those, you should be able to rock your traditional size in these. The slim fit is to keep weight down and to fit better when touring.

Answer TZU HAO C.'s Question

Ideally, washing a waterproof pant is not all too recommended. However, if you do choose to wash it, please reference the FAQ's on PolarTec's website here: https://www.polartec.com/faq Additionally, if you'd like to add secondary waterproofing treatments to your jacket, check out Nikwax here: https://www.backcountry.com/nikwax-tech-wash-txd-wash-in-twin-pack?skid=NIK0069-ONECOL-S10OZ&ti=U2VhcmNoIFJlc3VsdHM6bmlrd2F4OjE6NjpuaWt3YXg=

Answer dan3080211's Question

Hello Dan, unfortunately we don't have information on the NeoShell® waterproofing/breathability. However this link has even more information about PolarTec's awesome fabric: https://www.polartec.com/fabrics/weather-protection/neoshell